30 results about "Gene map" patented technology

The invention relates to a technological method for rapidly and finely positioning rice germplasm resource genes. The method mainly comprises the following steps: (1) selecting a rice variety with wide hereditary variation as a donor, and carrying out hybridization and backcrossing on the rice variety with the same recurrent parent respectively; selecting target traits including high yield, drought control, salt resistance and the like from a random population of a backcrossing introgressive line, so as to obtain a selected introgressive line population with the target traits; (2) carrying out non-target trait phenotype inspection on the multi-parent selected introgressive line population; positioning QTL (Quantitative Trait Locus) influencing non-target traits by utilizing a gene type and a phenotype, which are obtained by high-throughput sequencing, through genome-wide association analysis; (3) identifying a recombinant strain in a QTL confidence interval by adopting a high-density SNP (Single Nucleotide Polymorphism) gene type, and selectively inducing the recombinant strain with low frequency and combining a phenotype value to further finely position a QTL. The method is suitable for carrying out quantity trait QTL positioning and fine positioning on a multi-parent backcrossing population subjected to high-density sequencing; the gene map-based cloning time is shortened and a molecular breeding process is greatly accelerated.